<template>
  <div class="list" ref="wrapper">
      <div>
           <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currenCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                    v-for="item of hotCities"
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                    >{{innerItem.name}}</div>
                </div>
            </div>
      </div>
  </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
import BScroll from 'better-scroll'
export default {
  name: 'CityList',
  computed: {
    ...mapState({
      currenCity: 'city'
    })
  },
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
      // console.log(this.letter)
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .list
      overflow hidden
      position absolute
      top 1.58rem
      left 0
      right 0
      bottom 0
  .title
    line-height .54rem
    background #eee
    padding-left .2rem
    color #666
    font-size .26rem
  .button-list
    overflow hidden
    padding .1rem .6rem .1rem .1rem
    .button-wrapper
        float left
        width 33.33%
        .button
           margin .1rem
           padding .1rem 0
           text-align center
           border .02rem solid #ccc
           border-radius .06rem
   .item-list
      .item
        line-height .76rem
        padding-left .2rem
</style>
